Laser module and laser processing device

Abstract

A laser module of a laser processing device includes: a housing, provided thereon with a laser exiting part capable of allowing a laser to emit from an interior of the housing; a laser emitting apparatus, accommodated in the housing and configured to emit a laser; and a focusing apparatus, accommodated in the housing and located between the laser exiting part and the laser emitting apparatus, wherein the focusing apparatus is configured to adjust a focal position of the laser emitting apparatus and enable laser emitted by the laser emitting apparatus to emit from the laser exiting part.

What is claimed is: 
     
         1 . A laser module, comprising:
 a housing, provided thereon with a laser exiting part capable of allowing a laser to be emitted from an interior of the housing;   a laser emitting apparatus, configured to emit a laser; and   a focusing apparatus, accommodated in the housing and located between the laser exiting part and the laser emitting apparatus;   wherein the focusing apparatus comprises a driving apparatus and a focusing lens that are connected, the driving apparatus and the focusing lens are both accommodated in the housing, the focusing lens is configured to focus the laser emitted by the laser emitting apparatus, and the driving apparatus is configured to drive the focusing lens to move so as to adjust a focal position of the laser emitting apparatus.   
     
     
         2 . The laser module according to  claim 1 , wherein:
 the focusing lens comprises a single-focal-length lens, and a moving distance of the single-focal-length lens is equal to a moving distance of a focal point of the laser emitting apparatus; or   the focusing lens comprises a multi-focal-length lens, and a ratio of the moving distance of the multi-focal-length lens to the moving distance of the focal point of the laser emitting apparatus is less than 1.   
     
     
         3 . The laser module according to  claim 1 , wherein the laser exiting part comprises a laser exiting window lens, the focusing lens is arranged parallel to the laser exiting window lens; and the laser module further comprises a reflecting mirror, the reflecting mirror is accommodated in the housing, and the reflecting mirror is arranged corresponding to the laser emitting apparatus and the focusing lens respectively, and the reflecting mirror is configured to reflect the laser from the laser emitting apparatus to the focusing lens. 
     
     
         4 . The laser module according to  claim 3 , wherein the housing comprises:
 a first housing, provided with the laser exiting part, wherein the driving apparatus, the reflecting mirror and the focusing lens are all accommodated in the first housing, and in a moving direction of the focusing lens, the focusing lens is located between the reflecting mirror and the laser exiting part; and   a second housing, an interior of which is in communication with an interior of the first housing, wherein the second housing and the first housing are configured in a split design or formed as an integral unit, the laser emitting apparatus is accommodated in the second housing, the laser emitting apparatus has an emitting end, and the emitting end is disposed opposite to the reflecting mirror and extends into the first housing to allow the laser emitted by the laser emitting apparatus to reach the reflecting mirror.   
     
     
         5 . The laser module according to  claim 4 , wherein the first housing is provided with a laser entry opening and a laser exit opening, the laser exiting window lens is configured to cover the laser exit opening, the emitting end is configured to be inserted into the laser entry opening and to extend into the first housing. 
     
     
         6 . The laser module according to  claim 4 , wherein a first chamber and a second chamber are formed in the first housing, and the first chamber and the second chamber are arranged adjacent to each other; the reflecting mirror and the focusing lens are both accommodated in the first chamber; the laser exiting part corresponds to the first chamber; one end of the second chamber is provided with a first through-opening; the first through-opening is in communication with the interior of the second housing; and the other end of the second chamber is provided with a second through-opening disposed opposite to the first through-opening. 
     
     
         7 . The laser module according to  claim 6 , further comprising a fan,
 wherein the second housing comprises a heat dissipation base and a heat dissipation cover, the heat dissipation base and the heat dissipation cover together define a first accommodating space, the laser emitting apparatus is accommodated in the first accommodating space, the fan is disposed at an end of the heat dissipation base and/or the heat dissipation cover away from the first housing, and the fan is configured to generate an airflow to reduce heat of the heat dissipation base and/or the heat dissipation cover.   
     
     
         8 . The laser module according to  claim 7 , wherein the heat dissipation base comprises a bottom wall, and a plurality of side walls connected to the bottom wall; a plurality of fins are disposed on both sides of two side walls facing away from each other. 
     
     
         9 . The laser module according to  claim 7 , wherein the second chamber is provided with a plurality of through-openings, and a lengthwise direction of each through-opening is perpendicular to an arrangement direction of adjacent fins. 
     
     
         10 . The laser module according to  claim 7 , wherein a semiconductor cooling element is disposed between a bottom wall of the heat dissipation base and the laser emitting apparatus, a cold end of the semiconductor cooling element is used for heat absorption and in contact with the laser emitting apparatus, and a hot end of the semiconductor cooling element is used for heat dissipation and in contact with the bottom wall. 
     
     
         11 . The laser module according to  claim 1 , wherein the driving apparatus comprises:
 a bracket, connected to the housing, wherein both ends of the bracket are respectively provided with end plates arranged at an angle to the bracket, and the two end plates correspond to each other and are spaced apart from each other;   a lead screw nut, provided with a lens holder for fixing the focusing lens;   a lead screw, extending between the two end plates, wherein the lead screw is threadedly connected to the lead screw nut, and the lead screw is rotated to drive the lead screw nut to move in an axial direction of the lead screw; and   a motor, provided on one of the end plates, wherein the lead screw passes through the end plate and is in transmission connection with the motor, and the motor is configured to drive the lead screw to rotate.   
     
     
         12 . The laser module according to  claim 11 , wherein the driving apparatus further comprises:
 guide rods, wherein both ends of each of the guide rods are respectively connected to the two end plates; two guide rods are disposed, and the lead screw is located between the two guide rods in a direction perpendicular to a moving direction of the lead screw nut; and   a middle portion of the lead screw nut is sleeved on the lead screw, and both side ends of the lead screw nut are each provided with an open slot, and the two guide rods are respectively inserted into the open slots at both side ends of the lead screw nut.   
     
     
         13 . The laser module according to  claim 1 , further comprising:
 a ranging sensor, disposed on the housing and configured to detect thickness information of an object to be processed, so that the focusing apparatus adjusts the focal position of the laser emitting apparatus based on the thickness information;   wherein the ranging sensor comprises at least one of an ultrasonic sensor or a laser ranging sensor, and the ranging sensor and the laser exiting part are located on the same side of the housing and are spaced apart.   
     
     
         14 . The laser module according to  claim 1 , wherein:
 the housing is provided with an air guide channel, and a surface of the housing is provided with an air outlet in communication with the air guide channel; and   the laser module further comprises an air nozzle, the air nozzle is connected to the housing and covers the air outlet and the laser exiting part, a first channel facing the laser exiting part is formed inside the air nozzle, and a second channel is further defined inside the air nozzle and is in communication with the air outlet and the first channel.   
     
     
         15 . The laser module according to  claim 14 , wherein a clearance recess is recessed on an outer surface of the housing, and an end of the air guide channel penetrates through to an inner surface of the clearance recess, forming an air inlet in communication with the air guide channel in the inner surface of the clearance recess; and the laser module further comprises a connection nozzle, accommodated in the clearance recess, inserted into the air inlet, and configured for connecting a gas source. 
     
     
         16 . The laser module according to  claim 15 , wherein:
 the air nozzle comprises a connecting plate, covering and connecting to a bottom surface of the housing, and provided with a through hole and a recess having an opening;   on a side of the connecting plate facing away from the housing, an annular tube is arranged along an edge of the through hole in a projecting manner;   the annular tube and the through hole serve as the first channel, allowing the laser emitted by the laser emitting apparatus to pass through the through hole;   the recess serves as the second channel, covering at least a portion of an outer wall of the housing and at least a portion of the laser exiting part; and   the recess, together with at least a portion of the outer wall of the housing and at least a portion of the laser exiting part, defines a space for gas flow in communication with the air outlet.   
     
     
         17 . A laser processing device, comprising a rail structure and a laser module;
 wherein the laser module comprises:   a housing, provided thereon with a laser exiting part capable of allowing a laser to be emitted from an interior of the housing;   a laser emitting apparatus, configured to emit a laser; and   a focusing apparatus, accommodated in the housing and located between the laser exiting part and the laser emitting apparatus;   wherein the focusing apparatus comprises a driving apparatus and a focusing lens that are connected, the driving apparatus and the focusing lens are both accommodated in the housing, the focusing lens is configured to focus the laser emitted by the laser emitting apparatus; and   wherein the laser module is connected to the rail structure, and the rail structure is configured to drive the laser module to move in a first direction and a second direction that are perpendicular to each other; and the driving apparatus is configured to drive the focusing lens to move in a third direction perpendicular to the first direction and the second direction.   
     
     
         18 . The laser processing device according to  claim 17 , wherein:
 the focusing lens comprises a single-focal-length lens, and a moving distance of the single-focal-length lens is equal to a moving distance of a focal point of the laser emitting apparatus; or   the focusing lens comprises a multi-focal-length lens, and a ratio of the moving distance of the multi-focal-length lens to the moving distance of the focal point of the laser emitting apparatus is less than 1.   
     
     
         19 . The laser processing device according to  claim 17 , wherein the laser module further comprises a reflecting mirror, the reflecting mirror is accommodated in the housing, the reflecting mirror is arranged corresponding to the laser emitting apparatus and the focusing lens respectively, and the reflecting mirror is configured to reflect the laser from the laser emitting apparatus to the focusing lens; and
 wherein the housing comprises:   a first housing, provided with the laser exiting part, wherein the driving apparatus, the reflecting mirror and the focusing lens are all accommodated in the first housing, and in a moving direction of the focusing lens, the focusing lens is located between the reflecting mirror and the laser exiting part; and   a second housing, an interior of which is in communication with an interior of the first housing, wherein the second housing and the first housing are configured in a split design or formed as an integral unit, the laser emitting apparatus is accommodated in the second housing, the laser emitting apparatus has an emitting end, and the emitting end is disposed opposite to the reflecting mirror and extends into the first housing.   
     
     
         20 . The laser processing device according to  claim 19 , wherein the first housing is provided with a laser entry opening and a laser exit opening, a laser exiting window lens is configured to cover the laser exit opening, the emitting end is configured to be inserted into the laser entry opening and to extend into the first housing.